Dhtml is the combination of several built-in browser feature in fourth 4th generation browsers that enable a web page to be more dynamic. Dhtml is not a a scripting language but nearly e a browser feature or enhancement that gives your browser the ability to be dynamic. I think important it now tu to define just what the The cricketers of dhtml when they say dynamic dynamic is defined as the ability of the browser to after a web page looks and style after the document has loaded.
Web designer are often limited by default font such helvetica; Oracle and times-roman dhtml download able font readers Balvi able to see web page the way they are designed with text that responds to extract font size and style.
Dhtml is a new tool for designers to create webpage with special effect and n animation such age flying headlines and news tickers. Designer can attach a simple script to any object on a page and the user can change the appearance of a web page on the fly Prior Tu 2D HTML designer bar limited to writing complicated programs to achieve the same effect.
Enhance User experience.
Dhtml makes the web experience faster and more interactive for end user. Roti kha lo live updates can be activated by user and Browser drivin events.
For example text and image can be hidden in a document until a user Moves the mouse over and element or clicks a button. A browser driving event can be triggered by internal action search age vahan the browser finishes downloading the web page.
Dhtml uses cascading style sheet bhej provide Absolute positioning of every object on a page. Web Designer can have precise .
components of HTML
HTML requires for independent components to work; cascading style sheet scripting and the document object model. The section provides a brief description of each component.
HTML; HTML defines the structure of a webpage using such basic elements age headings forms tables paragraph and links on december 18 1997" HTML 4.0 attend " recommended" status at the W3C.change and enhancements introduced in HTML 4.0 made DHTML POSSIBLE.
CASCADING STYLE SHEETS (CSS): similar 2a template in a a word processing document a style sheet controls the formatting of HTML elements. Like in traditional desktop publishing one can use stylesheet to specify page margins point size and leadings cascading style sheet is a method to determine precedence and to to resolve conflict when multiples styles are used.
Scripting: scripting provides the mechanisms to interpret user actions produce client side changes to a page. For example scripts 10 interpret Mouse actions( such as the mouse passing over a specified area of a page throw the event model) and response to the action by using a set of Pre defined interaction(such as highlighting the text activated by the mouse action). All through dhtml can communicate with several scripting language JavaScript defect standard for creating crossbrour D HTML page.
Document object model: the d o m excellence web page content in way that makes it possible for HTML elements stylesheet and scripting language to interact with each other. The W3C define the DOM as "a platform and language natural interface that will allow programs and scripts to dynamically access and update the content ; structure ' and style of documents. The document can be further processed and the results of that processing can be incorporated back into the presented stage ".
What is the different between CSS and HTML?
HTML is used to structure content. CSS is used for formatting structure content.
Okay; it sounds a bit technical and confusing. But please continue reading. It will all make sense to you soon.
Back in the good old days essay A guy called Ud Ud Tim Berners lee invented the world wide web the language HTML only used to add structure to text. And author code marks text vi stating " this is a headline" or " this is a paragraph" using HTML tag search age<h1>and <p>. Veg Kabab Grained popularity , designers started looking for possibilities to add Layout to online documents. To meet this demand, the browser producer ( at that time Netscape and Microsoft) invented new HTML tag search age for example <font> which differed from the original HTML text by defining layout and not structure .
This is also lead to a situation where original structured text such as <table > were increasingly being misused to layout page instead of adding structure to text. Many new layout as such as <blink > 12 only supported by one type of Browser." You need browser exe to view this page" became a common disclaimer on websites.
CSS was invested to remedy this is situation by providing web designers with sopnisticated layout opportunity is supported by all browsers. At the same time, CP ration of the presentation style of documents from the content of documents makes side maintenance a lot easier.
Client server model
Internet barks in a client server model. This section throws some light condom service that are are used in the Marketplace today. Server platforms refers to operating system that drives the server.
Application servers
Application servers are the types of middleware which occupy a large chunk of computing territory between data base and the and user they connect the two.
Audio/ video server
Audio and video server bring multimedia capabilities to websites by enabling they to broadcast streaming multimedia connect.
Chat servers
Chat service enable a large number of users to exchange information in an environment similar to internet newsgroups that offer real time discussion capabilities.
Fax servers
Fax servers are ideal solution for organisation looking to reduce incoming and outgoing telephone resources but that need to FAX actual documents.
FTP servers
FTP servers Sarve one of the the oldest internet services. It makes it possible to move one or more files security between computers while providing file security and Organisation as well as transfer control.
Groupware servers
a groupware servers software designed to enable uses corporate regardless off location via internet or corporate intranet and to work together in a virtual atosmphere.
IRC servers
IRC servers provide an option for those seeking real time discussion capabilities internet relay chat consist of various separate networks (or " nets") cop servers that allow users to connect to each other via an IRC network.
List servers
List server offer a way to better manage mailing list vedar de bi interactive discussion open to the public or banvaya list that deliver announcement newsletters aur advertising.
Mail servers
Mail servers move and store Mel over corporate networks.( via LANs and WANs) and across the internet.
News Servers
News server act as a distribution and deliver source for the thousand of public news groups currently accessible over the USENET News network.
Proxy servers
Proxy servers sit between a client program ( typically a web browser) append and external server ( typically another server on the web ) to filter request improve performance and share connexions.
WEB SERVERS
A web server is a computer system ( hardware and software) that delivers ( servers up) Web pages. Every web server phase and IP address and possible a domain name for example if you enter the the URL http:www.stxaviers.com/nanhesingh.com.
Can your browser sends a request to the server whose domain name is stxavier . Com Desawar 10 50 the page namenanhesingh. html and sends it to your browser.
Any computer can be turned into a web server by installing server software and connecting the machine to the internet there for many web server software application including public domain software from NCS and Apache and commercial package from Microsoft Netscape and others.
Protocol
A protocol is a program written as per make Chali accepted standard that two computers used to communicate with each other. Computer C use protocols ( protocol programs) t format consistently their message so so that other computers can understand them acknowledge the reciept off message indicate that day or finished sending a message and so on. In order to establish the need connectivity both the client machine and the server machine must have a common protocol program. This is illustrated in figure
10 short essay protocol page and agreed-upon format from transmitting data between two devices. The protocol determines the following:
1 the type of error checking to be used
2 data comparison method if any
3 how the sending device will indicate that it has finished sending a message.
4 how the receiving device will indicate that it has received a message.
